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MP2623GR-Z

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MP2623 – 2A, 24V INPUT, 1.1MHz 1- OR 2-CELL SWITCHING LIFEPO
4
BATTERY CHARGER
MP2623 Rev. 1.0 www.MonolithicPower.com 4
12/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 19V, T
A
= 25°C, CELLS=0V, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
EN input low voltage
0.4 V
EN input high voltage
1.8 V
EN
=4V
4
EN input current
EN
=0V
0.2
A
EN =4V
0.5 mA
Supply current (shutdown)
EN =4V,
Consider VREF33 pin
output current,
R
3
=10k,R
NTC
=10k
0.665 mA
Supply current (quiescent)
EN =0V, CELLS=0V
2.0 mA
Thermal shutdown
(5)
150 °C
VREF33 output voltage 3.3 V
VREF33 load regulation I
LOAD
=0 to 10mA 30 mV
Notes:
5) Guaranteed by design.
MP2623 – 2A, 24V INPUT, 1.1MHz 1- OR 2-CELL SWITCHING LIFEPO
4
BATTERY CHARGER
MP2623 Rev. 1.0 www.MonolithicPower.com 5
12/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin # Name Description
1 VCC IC Supply Voltage.
2 NTC
Thermistor Input. Connect a resistor from this pin to VREF33, and the thermistor from this
pin to ground.
3
ACOK
Valid Input Supply Indicator. Open drain output. Add a pull-up resistor. Logic LOW indicates
the presence of a valid input supply.
4
CHGOK
Charging Status Indicator. Open drain output. Add a pull-up resistor. Logic LOW indicates
normal charging. Logic HIGH indicates either a completed charge process or a fault-
suspended process.
5 VREF33
Internal Linear Regulator, 3.3V Reference Output. Bypass to GND with a 1F ceramic
capacitor.
6
EN
On/Off Control Input.
7 CELLS
Command Input. Indicates the number of LiFePO
4
battery cells. Connect to VREF33 or float
for 2-cell operation. Ground for 1-cell operation.
8 COMPV
V-LOOP Compensation. Decouple this pin with a capacitor and a resistor.
9 COMPI
I-LOOP Compensation. Decouple this pin with a capacitor and a resistor.
10 BATT
Positive Battery Terminal.
11 CSP
Battery-Charge Current-Sense–Positive Input. Connect a resistor RS1 between CSP and
BATT. The full charge current is:


mRS1
200mV
AI
CHG
.
12 GND
Ground. Voltage reference for the regulated output voltage. Place this node outside of the
path of the switching diode (D2) to the input ground to prevent switching current spikes from
inducing voltage noise.
13 TMR
Set-Safe–Time Period. A 0.1µA current charges and discharges the external capacitor
decoupled to GND. The capacitor value programs the time period.
14 BST
Bootstrap. Requires a charged capacitor to drive the power switch’s gate above the supply
voltage. Connect a capacitor between SW and BST pins to form a floating supply across the
power switch driver.
15 SW Switch Output.
16 VIN
Regulator Input Voltage. The MP2623 regulates a 5V-to-24V input to a voltage suitable for
charging either a 1- or 2-cell LiFePO
4
battery. Requires capacitors to prevent large voltage
spikes from appearing at the input.
MP2623 – 2A, 24V INPUT, 1.1MHz 1- OR 2-CELL SWITCHING LIFEPO
4
BATTERY CHARGER
MP2623 Rev. 1.0 www.MonolithicPower.com 6
12/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
=5V/ 9V, C1=4.7μF, C2=22μF, L=4.7μH, RS1=100mΩ, Real/Simulation Battery Load, T
A
=25°C,
unless otherwise noted.
TIMES(MIN)
BATTERY VOLTAGE(V)
CHARGE CURRENT(A)
2 Cells Charge Current vs.
Battery Voltage
Battery Simulator
BATTERY VOLTAGE(V)
CHARGE CURRENT(A)
TIMES(MIN)
BATTERY VOLTAGE(V)
BATTERY VOLTAGE(V)
CHARGE CURRENT(A)
NTC Control Window
0
0.5
1
1.5
2
2.5
3
8 1216202428
V
NTC
(V)
Low Temp On
High Temp On
High Temp Off
Low Temp Off
Breakdown Voltage
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
0
2
4
6
8
10
12
14
16
0 10203040
EFFICIENCY (%)
Efficiency vs.
Battery Voltage
1 Cell, I
CHG
=2A
Efficiency vs. I
CHG
1 Cell, V
BATT
=3.6V
Efficiency vs. V
IN
1 Cell, V
BATT
=3.4V, I
CHG
=2A
EFFICIENCY (%)
EFFICIENCY (%)
0
0.4
0.8
1.2
1.6
2
2.4
01234
V
IN
=24V
6.5
6.6
6.7
6.8
6.9
7
7.1
7.2
7.3
0 5 10 15 20 25
0
0.4
0.8
1.2
1.6
2
2.4
012345678
0
10
20
30
40
50
60
70
80
90
2.5 2.7 2.9 3.1 3.3 3.5 3.7
V
IN
=5V
V
IN
=9V
V
IN
=19V
10
20
30
40
50
60
70
80
90
100
0 500 1000 1500 2000 2500
CHARGE CURRENT(A)
V
IN
=5
V
IN
=9V
V
IN
=19V
V
IN
=24V
0
10
20
30
40
50
60
70
80
90
0 5 10 15 20 25
V
IN
=9V
V
IN
=24
V
IN
=5V
1 Cell Battery Charge Curve
1 Cell Charge Current vs.
Battery Voltage
Battery Simulator
2 Cells Battery Charge Curve
3.27
3.32
3.37
3.42
3.47
3.52
3.57
3.62
010 20 3040 50
60
0
0.5
1
1.5
2
2.5
I
CHG
V
BATT
0
0.5
1
1.5
2
2.5
I
CHG
V
BATT
CHARGE CURRENT(A)
INPUT VOLTAGE (V)
V
IN
=24V
BATTERY VOLTAGE(V) INPUT VOLTAGE (V)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MP2623GR-Z

Mfr. #:
Buy MP2623GR-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Battery Management 2A 1-2Cell Switching LiFePO4 Bat Charger
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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